Tony Whitmore gives a short talk on RSS and how it is used. This talk does not require any existing knowledge of the subject.
See http://www.hantslug.org.uk/cgi-bin/wiki.pl?TechTalks for more details and copies of the presentation that accompanied the talk. This talk was given at the Hampshire Linux User Group (HantsLUG) meeting on 2nd September 2006 at Park Hall Church Hall in Aldershot.
There is also an OGG Theora / Vorbis version available at: http://www.archive.org/download/HampshireLinuxUserGroupRSSNewsblogsandpodcasts/rss.ogg